Means for use in the molding of concrete building blocks



Nov. 20,1923. mgsm J. T. BROWNE ET AL MEANS FOR USE IN THE MOLDING OFCONCRETE BUILDING BLOCKS Original Filed June 50 1921 2 sheet -Shee 1Nov. 20, 1923. mmsm J. T. BROWNE ET AL MEANS FOR USE IN THE MOLDING OFCONCRETE BUILDING BLOCKS Original Filed June 30, 1921 2 Sheets-Sheet 2Patented Nov. 29, 1923.

JOHN THOMAS BRO'WNE AN D WILLIAM. BLACK, 01? HAMILTON, NEW ZEALAND.

MEANS FOR USE IN THE MOLDING [3F CONCRETE BUILDING BLOCKS.

Application filed June 30, 19%, Serial No. 481,535.

To aZZ whom it may concern:

Be it known that we, Jonn THOMAS BRowNn and WILLIAM Briton, subjects ofthe King of Great Britain, residing at Victoria Street, Hamilton, in theDominion of New Zealand, have invented a new and useful Improvement inMeans for Use in the Molding of Concrete Building Blocks, of which thefollowing is a specification.

This invention has been devised in order to provide improvements inmeans for use in the molding of concrete building blocks. The meansdevised consist in a special construction of mould proper by the use ofwhich the block is formed of two vertical slabs tied together bymetallic reinforcing ties at an approved distance between their faces,so that the twin block thus formed may be used with others in theerection of cavity walls, and in a special construction of apparatus bymeans of which the mould may be removed clear of the block mouldedwithin it, so that the block may be removed for drying.

In fully describing these means reference will be made to theaccompanying sheets of drawings, in which Figure l is a plan of themould in the assembled position ready for the casting of the blockwithin it, the reinforcing ties also being in position.

Figure 2 is a side elevation half being shewn in section.

Fi 'ure 3 is a cross sectional elevation taken on the line 3-3 of Figurel and looking to the left of such line.

Figure 4 is a plan of one end of a mould as formed for the molding of acorner block.

Figure 5 is a plan of the ordinary block made in the mould shown inFigures 1 to 3.

Figure 6 is a plan of the corner block made in the mould shown in Figure4.

Figure 7 is a side elevation of the mould lifting means shown inposition ready to lift amould.

Figure 8 is an end elevation thereof.

Figure 9 is a plan thereof.

Figure 10 is a sectional plan thereof taken on the line 1010 of Figure7.

Figure 11 is a cross sectional elevation thereof taken on the line 11-11of Figure 10 and looking to the left ofsuch line.

The block to be formed in the mould, in its simplest form as shewn inFigure 5, con- Renewed October 12, 1923.

sists in the twin slabs A-A of the required height, thickness and lengthfastened together at an approved distance apart in a manner alreadyknown, and in the special construction shewn, joined together by two ormore re-inforcing wires B arranged at convenient intervals in the heightof the block. Each of these. wires is arranged to extend continuouslythroughout the length of both slabs and across the space between them atthe respective ends. The wires as they cross from one slab to the otherare given downward kinks or bends in order that any passage of moisturealong the wires will be obviated.

in the corner block shewn in Figure 6, the outer slab A is made with aright angled extension A at one end that overlaps the end of the innerslab with the cavity space between, and finishes flush with the line ofthe inside face thereof. The space between the two slabs is thuscontinuous so that when the corner block is built into a wall with theother blocks butting on to its ends, the cavity will continue rightround the corner in a continuous line.

The blocks are formed with any of the usual grouting jointing grooves ain their top and bottom and end surfaces.

The mould proper is formed by plates of wood, iron or other approvedmaterial and consists in two side plates C of the required length andheight and two end plates D of the same height and of the lengthnecessary to correspond with the width of the full block. These areadapted to be assembled upon a pallet plate E to form the casting mouldand are locked together in the rectangular form. by the formation of theside edges of each end plate with tongues D extending therefrom, whichtongues pass through mortise slots C in the side plates and then havewedges d driven laterally through them and up against the outside facesof the side plates. Thus the four members of the mould casing are firmlylocked together. They may also be removed, when required, from around amoulded block.

The mould space thus enclosed is divided along its middle throughout thefull length and height by a core of special construction designed toposition and hold the reinforcing wires B in their places in the mouldand to allow for the mould members being readily removed from around amoulded block.

This core for the straight blocks continues from end to end of the mouldas shown in Figure 1, but for the corner block is shaped with a rightangled turn leading on to the inner side plate near one end, as shewn inFigure l.

The core, as shown in Figures 1 to 3, is made up of two plates F of thefull height of the mould and two end blocks G that are adapted to fitupon the inside of the mould ends D and to make joint with these platesF. Such plates are distanced apart the requisite distance by means ofvertical distance, bars H that pass through apertures in the pallet Eand are footstepped into the surface of the molding bench J upon whichsuch pallet rests.

Each block G is made with a groove 9 in its outside edge which slides onto a tongue 03. fixed vertically upon the inside of the adjacent mouldend. On its inside face it is formed with a wide deep groove G down itsfull length adapted to receive the adja cent distance bar H. Each edgethus formed on each side of this groove is made with a bevelled surfaceadapted to engage with beveled ends of the corresponding plates F sothat they interlock and hold the said plates from falling inwards intothe molding spaces between them and the sides of the mould. v

The edges of the block G on each side of the groove G are also formedwith slots g extending transversely across them at the requisite heightsand extending in for the neces sary distances, which slots are adaptedto accommodate the wires B in their assembly in the mould. The width ofthe groove G is such as to allow of the wires being given their downwardcurve as they cross the core width, before assembly in the mould andthen for such curved'portions lying within the groove, as shown. clearlyin Figure 3. The mould thus formed is assembled by first arranging thecasing in position with the end blocks G upon the respective end plates.The wires 13 are then laid in their respective slots, the corev plates Fplaced in position and the distance bars H passed down between them. Themould is then ready for casting and the concrete is poured into the:spaces on the respective sides'of the core. When it has setsufficiently, the casing is removed from round it, the distance bars I-Ilifted clear and the blocks G which had been left in the concrete thendrawn outwards from the ends thus clearing the wires B. This frees alsothe core plates F which may then be lifted out, leaving the blockstanding free upon its pallet E so that it may be removed thereon forstacking and drying and curing in the. usual way. r

The" same general features of construction govern the core required forthe corner block andas shown in Figure 4. In this however, the block Gis keyed on to one of the side plates C and is made in two parts betweenwhich the wires B pass, and the inside half of the double block lookswith a vertical block I: connecting the ends of the plates F and shapedto fit over thedistance bar H. V V

In assembling this core the two block halves G are arranged in positionupon the respective sides of the wires, the. block K then placed inposition, the plates F arranged in relation thereto and the distance barpassed down to hold them all in their relative positions. The parts aredisassembled after the molding and setting of the block by a reversal ofthese operations.

The blocks and other parts of the mould are, where necessary, made withslight tapers in order to obtain a free draw away from the 111011.] dedblocks.

The mould thus madeis adapted to be used in conjunction with specialmeans whereby it may be freed from the block moulded within it, withquickness and ease. Such means are designed to be moved about from mouldto mould and in use to be placed iuposition over a mould and then todraw upward clear of the block the whole of the mould casing and thedistance bars, leaving the blocks G in position so that they have merelyto be drawn out from the ends and the plates F free so that they may belifted clear, in order to remove the block on its pallet, and then tolower the parts lifted on to a fresh pallet.

These means are shown in position for operation in Figures 7 to 11. Theycomprise a framing formed by a pair of'standards M connected together attheir upper ends by a main central cross bar N and by two side tie bars0. The standards are positioned apart a distance such as to correspondwith the outside length of the mould casing and each one is made of awidth to fit in between the side plates of such casing. Consequently theframe may be arranged to fit over the mould in the manner shown in thedrawings and to rest upon the pallet. and when in position to be heldfrom movement in any horizontal direction by the engagement of itsstandards with the side and end plates of the mould.

A screw threaded rod P is provided and screwed vertically down through athreaded bearing in the centre of the main cross bar N. This rodsupports a lifting. frameR at its lower end which frame comprises atransversely extending jbar R at each end which is positioned,approximately close above the corresponding end of the mould. It is madelong enough to project at itsends beyond the sides of the mould, Uponeach of the ends of the cross bar a long link S is suspended which linkis adapted to pass over a pin 8 fixed to project outward from the'mouldcasing side and provided for that purpose. Another link is suspendedfrom the middle of the bar and this is adapted to hook on to a pin '71,near the top end of the distance bar H at the corresponding end of themould. Thus the lifting frame may be, when lowered, connected to themould casing near each of its four corners, and to the two distancebars, so that when raised by the rotation of the screw P, it will liftthese parts bodily with it.

To guide the frame in its up and down movements, a vertical guide rod Tis fixed to each side cross bar 0 near each end thereof to extenddownwards therefrom, and small guide pieces 2" are fixed to the frame Rto engage the several rods. These rods also at their bottom ends arefixed to the two ejector plates U which are made of widths and lengthsto correspond with and it within'the respective molding spaces of themould. They thus serve to hold these plates in position and are made ofsuch a length as to position the plates just above the level of themould top. Consequently as the lifting frame moves upwards and lifts themould casing, these plates will onter the molding spaces and engagingthe top of the block members the-rein, will prevent the block beinglifted and will in effect act as rams to force the block free of themould.

Then when the block has been removed, the lifting frame is lowered againand the apparatus freed from the mould and lifted away for use uponanother mould. The screw rod P is provided with the usual lever handle pfor rotating it in the required manner.

We claim 1. A mould for use in the formation of concrete blocks formedby a mould casing constructed with sides and ends removably securedtogether, and a centrally extending core for dividing the casing spacelengthwise into two, formed by two endblocks removably attached down theinsides of the respective casing ends and each made with a deep grooveextending down its inner face,

distance bar pieces fitting within the grooves of the respective endblocks, and two vertically extending core plates extending upon oppositesides of such distance pieces and interlocking at their ends with theinner edges of the corresponding end blocks, substantially as specified.

2. In a mould for use in the formation of concrete blocks constructed asdescribed in claim 1, constructing each of the end blocks of thecore'with slots extending transversely across its inner edges andinwards from such edges, substantially as and for the purposesspecified.

3. In means for use in molding concrete blocks, a mould formed by acasing and a core extending through such casing and dividing its spacelengthwise into two, and means for raising and lowering such casingconsisting in a framework adapted to be fitted over the casing andcomprising an overhead cross beam, extending longitudinally with thecasing, a horizontally disposed lifting frame having means for itsattachment to each corner of the casing, and a vertically disposed screwrod threaded through the said cross beam and having its lower endconnected to the lifting frame, gublstantially as and for the purposesspeci- 4. In the means for use in molding concrete blocks set forth inclaim 3, the combination with the said raising and lowering means, of apair of horizontally extending plates adapted to fit within therespective divisions of the mould casing, and vertical rods extendingrigidly downward from the top of the framework and attached, at theirlower ends to the said plates, substantially as and for the purposesspecified.

In testimony whereof, we aihx our signa tures.

JOHN THOMAS BROWNE. WILLIAM BLACK. Witnesses:

DAVID BROWN HorroN, JOSEPH STANLEIGH MoAviN.

